About Us


Keystone Agency 事務所周辺,ゲート2通り
Aspiring to Be Your Reliable Ally

Keystone Agency

Keystone Agency LLC is based in Okinawa City, Okinawa. We provide administrative support services, translation, and interpretation services to the private sector as well as the U.S. military. We also provide NCAGE/SAM/UEI registration and renewal assistance to support U.S. military projects. We pride ourselves on our expertise in identifying the resources required to transcend language barriers and lead businesses to success. Through our services, we help startups and established enterprises alike to take advantage of the unlimited potential offered by today's unique marketplace.

At Keystone Agency, we are reevaluating the traditional role of translation agencies to ensure our services precisely meet our clients' needs. To achieve this, we prioritize understanding our clients' intentions and constantly strive to convey them effectively across multiple languages through various methods. Additionally, by utilizing a small team structure and a wide range of IT solutions, we aim to maximize cost performance and offer the most attractive services in the industry. Through the optimization of our services, we endeavor to serve as the 'keystone'—an essential component—in our clients' success.


Company Name:Keystone Agency LLC
Representative:Ritchi Kumagai
Scope of Service:Administrative Support, Translation, Interpretation, Business Startup and Management Consulting, International Business Management Support
Foundation:April 2014 (incorporated April 2021)
Address:Suite 104, 1-22-18 Chuo, Okinawa City, Okinawa 904-0004
Employees:5 (including contract and part-time employees)
AffiliationsAmerican Chamber of Commerce in OkinawaOkinawa Chamber of Commerce and IndustryJapan Translation Association

Director Profile

Ritchi specializes in domestic and international business transactions, covering a wide range of industries, from construction and finance to IT and marketing. With over 10 years of experience as a translator, he has played a dynamic role in a variety of projects, assisting overseas companies to enter the Japanese market and Japanese companies expand overseas. Keystone Agency was founded by Ritchi in 2014.

Contact Us

Free Consultation

Scroll to Top